Synthesis and Gas Sensing Properties of TiO ₂ –ZnO Core‐Shell Nanofibers

Abstract

We fabricated TiO 2 –ZnO core‐shell nanofibers via a novel two‐step process. In the first step, the TiO 2 core nanofibers were synthesized by electrospinning. Subsequently, the ZnO shell layers were grown in a controlled manner using atomic layer deposition. The methodology proposed in this work is expected to be one of most suitable methods for preparing various kinds of oxide core‐shell nanofibers or nanowires. We investigated the O 2 sensing properties of the synthesized core‐shell nanofibers. Good sensitivity and dynamic repeatability were observed for the sensor, demonstrating that the core‐shell nanofibers hold promise for the realization of sensitive and reliable chemical sensors.